# st: RE: matrix out

 From "Martin Weiss" To Subject st: RE: matrix out Date Sat, 12 Dec 2009 10:46:03 +0100

```<>

Just look at the instructions that you have given to Stata: You want the
-rownames- to be equal to your "varlist" -local- so that is what you get.
Stata repeats the second entry in the -local- as often as it needs to to
fill the matrix rows. Your problem might be easily solved via -statsby-, by
the way...

*******
local varlist "strokeriskNULL strokeriskP55"
matrix out = J(20,3,-99)
matrix colnames out = risk sex age
matrix rownames out = `varlist'

mat li out
*******

out[20,3]
risk   sex   age
strokerisk~L   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99
strokeris~55   -99   -99   -99

HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Victor Mauricio
Herrera
Sent: Samstag, 12. Dezember 2009 08:08
To: statalist
Subject: st: matrix out

Hello, I'm trying to obtain a matrix using the following code:

*********************************************
local varlist "strokeriskNULL strokeriskP55"
matrix out = J(20,3,-99)
matrix colnames out = risk sex age
matrix rownames out = `varlist'
local irow = 0
foreach var in `varlist' {
foreach i in 2 3 4 5 6 {
foreach s in 0 1 {
local ++irow
qui mim, storebv: svy: regress `var' if sex==`s' & ageg==`i'
matrix A=e(b)
matrix out[`irow',1]=A[1,1]
matrix out[`irow',2]=`s'
matrix out[`irow',3]=`i'
}
}
}
matrix list out
*******************

I expect to get ten lines starting with "strokeriskNULL" and ten starting
with "strokeriskP55". However I get only the first line starting with
"strokeriskNULL" and the remaining 19 starting with "strokeriskP55".

Could anybody point me to what's wrong with these instructions?
Very thankful,

Mauricio Herrera.
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```

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